saw the pictures, your old radiator was a Honda Prelude or Accord Si radiator (the lower pipe fitting is larger than normal) - its fin core is completely made of copper and its an excellent and quite expensive radiator. But its leaking from quite a few places now. - The factory radiator on this car is single channel copper core with plastic tanks.
The main fan is not correct, it originally comes with a very weak motor and this one looks like a suzuki mehran replacement item.
about your belt issue, installing and tensioning the belts on this engine is very easy - takes 20 minutes at most to install and tension all 3 belts. Never use undersized or bad belts - and dont try to install belts by jumping the starter, the tensioning rod is very easy to use on the alternator.
it is also very easy to change the water pump on this engine, the lowest bolt is hidden by a small cover in the lower timing belt cover, a good mechanic would know of it and remove that bolt from there - it requires a 1/4 inch drive ratchet set. Other usual variety idiots remove the whole timing belt cover and then forget to install the foam/rubber seal back on it too.
the smoke episode you speak of sounds like you roasted the clutch, dont do that.